Presenter With its tiny legs and stiff, upright posture a penguin has a waddle that's more than a little ungainly. But by installing a high-tech track in London Zoo, scientists will measure every tiny movement the birds make.

Insert The researchers will then compare this data with penguin fossils. They think that the ancient birds didn't waddle and had a more horizontal posture with different leg anatomy. The scientists suspect that as modern-day penguins became better adapted to swimming, they became more clumsy on land. Tom So, they aren’t the same!We’ve heard how modern penguins have an upright posture. Penguins in the past were the opposite! They had a horizontal posture. Caalii‘Horizontal’, jechuun dalga. Which means they were lying flat!

TomRight! Their legs have probably adapted over time as their posture changed.